Abstract: The hydrodynamic calculation is an important part of the design for gas transmis sion pipeline. The calculation of fractional resistance coefficient is the key content of the correspo nding hydrodynamic computation. Therefore, it is necessary to analyze, discuss and compare the formulae for frictional resistance that ar e applied in hydrodynamic calculation. Turbulent region formulae for frictional resistance calculation published home and abroad or applied on the spot are coll ected in this paper. By means of calculating and plotting, the formulae are compared, assessed and tested delicately and formulae for the frictional resistancethat are applicable to each turbulent region are confirmed. So, the formulae that are applicable to gas pipeline engineering design are recommend in the article.